If you drive a modern car, this is the dealbreaker. The older v2/6.3 builds do not have native Android Auto support. To get that, you must update to the modern v3 builds.
This was the #1 most-voted feature by the community. You can now long-press between buttons on the player screen to enter an edit mode, choosing from over 20 different buttons Poweramp 6.3 Apk
: Extends the dynamic range by bypassing standard Android volume limitations. Extensive EQ If you drive a modern car, this is the dealbreaker